In 1933, Swiss astrophysicist Fritz Zwicky was observing the Coma Cluster — a massive congregation of galaxies about 300 million light-years away — when he noticed something odd. The galaxies were swirling around each other far too fast. According to the visible matter in the cluster, they should have flown apart long ago. “There must […]
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The stars in the sky seem to shine forever, but they too are subject to lifespans determined by their mass and internal physics. Some last for billions of years and others are transitory in comparison, with far shorter lifetimes. Regardless of duration, all stars survive by maintaining a balance between two competing forces: the inward […]
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After a gap of close to 50 years after the last Apollo mission, NASA plans to herald a new age of space exploration by returning to the Moon with the Artemis program, starting with the Artemis I launch scheduled for August 29. But that is not the only news that will interest space buffs. Here […]
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Our universe is expanding at an accelerating rate and no one is really sure why. This seemingly contradicts current scientific knowledge of how gravity works and how it affects the world we live in. The cause of this acceleration is called “dark energy,” and it remains a mystery. But NASA scientists are helping probe this […]
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The Laser Interferometer Gravitational-wave Observatory (LIGO) is scheduled to begin its fourth run of operations in March 2023 after over two years of maintenance work and upgrades. During its latest operational run, LIGO and its two detectors will work in tandem with the Virgo Interferometer in Italy and the KAGRA observatory in Japan. But this […]
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